Apparatus for applying abrasive to polishing wheels, belts, or the like



Nov. 9, 1937. 5 PORTER 2,098,306

APPARATUS FOR APPLYING ABRASIVE TO POLISHING WHEELS, BELTS, OR THE LIKE Filed March 17, 1937 4 Sheets-Sheet l I J. s. PORTER 2,098,306

ABRASIVE TO POLISHING WHEELS BELTS, OR :IHE LIKE Nov. 9, 1937.

APPARATUS FOR APPLYING Filed March 17, 1937 4 Sheets-Sheet 2 Nov. 9, 1937. PORTER 2,098,306

APPARATUS FOR APPLYING ABRASIVE TO POLISHING WHEELS, BELTS, OR THE LIKE Filed March 17, 1937 4 Sheets-Sheet 3 N33) 9 as Guy-W15 Nov. 9, 1937. J 5 PORTER 2,098,306

APPARATUS FOR APPLYING ABRASIVE TO POLISHING WHEELS, BELTS, OR THE LIKE Filed March 1'7, 1937 4 Sheets-Sheet 4 Patented Nov. 9, 1937 UNITED STATES PATENT QFFEQE APPARATUS FOR APPLYING ABRASIVE TO POLISHING WHEELS, BELTS,

LIKE

OR THE Application March 17,1937, Serial No. 131,461

20 Claims.

This invention relates to apparatus for applying abrasive to wheels or belts, and more particularly to a device for supporting the wheel or belt during the application of the adhesive, such as glue or cement, which is normally applied prior to the application of the abrasive, and then moving the wheel or belt to a position where it will come into contact with a quantity of the abrasive. Preferably the device will be so constructed that,

if desired, a certain amount of pressure may be applied to the wheel when the abrasive is being applied, so that the latter may be forced into the adhesive under pressure.

Machines for this purpose have been made in the past, as illustrated, for example, by my prior Patents Nos. 1,775,110 of September 9, 1930, and 1,998,905 of April 23, 1935. The present invention relates to a device which has certain advantages over the devices shown in the prior patents referred to, and which also may be simple in construction and which may be operated rapidly and. with considerable efliciency.

As the character and fineness of the abrasive applied to the polishing element, whether a belt or a wheel, depends upon the character of the work to be done, it is desirable that a machine of this kind be prepared for the application of various abrasive materials. To this end the present device is provided with a rotatable abrasive container, which may be readily removed from the machine and replaced with a new one, so that if several containers are kept on hand, each containing a different variety or grain size of abrasive material, it will be seen that the proper container may be readily placed upon the machine.

One object of the present invention is the provision of an apparatus for applying abrasive to belts, polishing wheels or the like, which will be 40 relatively simple in operation and construction,

and therefore relatively economical to manufacture.

A further object of the invention is the provision of a device of the character described hav- .;,5 ing a movable or rotating abrasive container, which may be rotated with the surface of the abrasive therein in contact with the surface of the wheel or belt to be covered.

A still further object of the invention is the 50 provision of a device of the character described having means for supporting a polishing wheel or belt and an abrasive container, so that the belt or wheel may be moved while in contact with the abrasive in the container, and may also be 55 moved out of a position above the container for the application of an adhesive material, such as glue or cement.

A still further object of the invention is the provision of a device of the character described, which shall provide a movable support for the 5 polishing element, such as a wheel or belt, so that this element may have both the adhesive and abrasive applied while supported on the machine in a convenient and relatively simple operation. 10

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the drawings:

Fig. 1 is a front view of an apparatus for apply- 15 ing abrasive to a polishing wheel embodying my invention;

Fig. 2 is a top plan view of the device shown in Fig. 1;

Fig. 3 is a modified sectional view taken gen- 20 erally on line 33 of Fig. 1;

Fig. 4 is a. side elevational view partly in section on line 44 of Fig. 1;

Fig. 5 is a detail sectional view on line 5-5 Of Fig; 3;

Fig. 6 is a detail sectional view on line 6-6 of Fig. 2;

Fig. '7 is a front elevational view similar to Fig. 1 showing the device arranged for applying abrasive to the polishing belt;

Fig. 8 is a top plan view of the device shown in Fig. 7; and

Figs. 9 and 10 are sectional Views taken respectively on lines 9-9 and Ill-l0 of Fig. 8.

To illustrate a preferred embodiment of my invention, I have shown an apparatus comprising a base portion it having standards ll, l2 and I3 rising therefrom, within which standards are rotatably supported shafts i l, i5 and 16. Upon the shaft I5 is secured a disk-like supporting member ll which removably supports the abrasive pan or container is. Centrally disposed upon the support H is an upstanding cone frustum [9 which fits within a complementally shaped recess at the center of the pan I8.

The shaft I5 carries a sprocket wheel 2t driven by a sprocket chain 29 from a sprocket wheel 22 secured upon the shaft it. The shaft 5 may be driven by the motor 23 through suitable reduction gearing contained in the gear box 24, the motor and gear box being supported by the upstanding member !3. On the upper end of the shaft It a crank 25 may be removably secured, so that, if desired, this shaft may be turned by hand. It will be understood, however, that the crank is usually omitted when the device is driven by the motor 23.

Secured to the shaft i4 is a bracket arm 26 to the upper end of which is pivoted at 21 a link 28, which link passes through a slotted member 29 upon the upper end of the shaft I4.

To the free end of the link 28 is secured an arbor 38, this arbor being supported in a collar 3i and secured against rotation by means of the set screw 32. The arbor projects forwardly from the link 28, and is provided with a reduced portion 33 upon which is rotatably mounted a bushing 34, upon which bushing is supported a polishing wheel or work member 35, which is to be covered with abrasive. The reduced portion 33 of the arbor projects forwardly of the wheel, and upon the projecting end of this member is mounted a crank hub 36 carrying a manually operable crank 31. Beyond the crank hub a second sleeve 38 is also rotatably mounted on the projecting end of the reduced portion 33 of the arbor. The crank 3! enables the wheel to be positively turned by the operator when desired, and particularly during the application of the glue or cement to the wheel. The sleeve 38, rotatably mounted on the reduced end 33 of the arbor, may be grasped by the operator so that he may apply pressure to the Wheel when in contact with the abrasive, if so desired. For the same purpose, a handle 39 is secured at the end of the link 28, so that the wheel may be pressed downwardly into the abrasive with both hands, if this is found necessary.

As shown more especially in Fig. 4, a bell crank lever 33 is pivoted at 4| to the lower portion of the slotted member 29, one arm of this bell crank lever extending upwardly and being provided with a tooth or lug 42 extending into the slot 43. As shown in Fig. 4, the link 28 lies below the lug 42. It may, however, be raised to occupy the upper part of the slot 43, and rest upon and .be supported by the .lug 42. In the 1 lower position, as shown in Figs. 1 and 2, the

link 23 supports the abrasive wheel or work .member in a position to contact with the abrasive in the pan or container l8.

The other arm extends forwardly from the pivot 4i, and is connected by a rod 44 with a crank 45 mounted on the end of a rock shaft 46, which shaft extends across the machine and is designed to be rocked by the foot pedal 41. It will be understood that when the operatorpresses upon the pedal 4?, the rod 44 will be drawn .downwardly, and the member 42 will be withdrawn from a position within the slot 43. If, prior to the withdrawal of the lug 42, the link 28 has been in its upper position, it will now be permitted to drop by gravity into the lower position shown in Figs. 1 to 4.

A downwardly acting spring 48 is arranged to press upon a member 49 secured to the bell crank lever to maintain the lever in the position shown in Fig. i, and it will always be returned to this position immediately that the foot pedal 41 is released. The arm 44 is provided at its upper end with a lost-motion connection with the bell crank lever 48, so that the latter may move when the link 28 is raised to its upper position without necessarily efiecting movement of the rod.

To the shaft i4 is secured an operating arm 56 by means of the set screw 51, and an intermediate portion of this arm is designed to ride upon a segment 52 provided upon the upper portion of a bracket 53 supported upon the standard 52. At its free end the arm 50. is provided with a tubular portion 54 within which is rotatably mounted an upwardly extending operating handle 55. At its lower end this handle carries a crank arm 56 connected by a link 5'! to a plate 58 pivoted at 59 upon the arm 50. On the lower surface of this plate are a pair of spaced downwardly projecting pins 60 and 6|, designed to straddle the segment 52, and to enter notches 62 and 63 provided in lateral surfaces of the segment. These notches are upon opposite sides of the segment, one of them being adjacent the inner end and the other adjacent the outer end.

It will be apparent that if the handle is rotated in a clockwise direction, as shown in Fig. 3, the plate 58 will be moved to the right, thus withdrawing the pin 6| from the notch 63 in the segment 52, and the arm 56 may then be moved along the segment from the full line position shown in Fig. 3 to the dotted line position shown therein, in which position the pin engages in the notch or recess 62 to releasably hold the arm 50 in its adjusted position. This movement of the arm also swings the shaft l4, bracket arm 26, and link 28, as will be explained hereinafter.

Upon the shaft I 6 is rotatably or swingably mounted a bracket 65 which supports at its outer end the container for the adhesive material such as glue or cement, which is applied to the wheel efore the application of the abrasive. This container may be swung from the full line position shown in Fig. 2 to the dotted line position shown in this figure, the first position being an outofthe-way position occupied by the container while the abrasive is being applied, and the other being the position assumed when it is desired to apply adhesive to the wheel, which is at that time also in the dotted line position shown in Fig. 2. Attached to the bracket is a guard 61 which is contacted by the end of the arm 50 when this arm is in the full line position shown in Fig. 2, in order that the container 56 will be positively held in the out-of-the-way position. The contact of this member with the guard 61 also serves to swing the container to this position when the arm is swung from the dotted line to full line position in Fig. 2.

It is desirable to provide means for maintaining the surface of the abrasive in the container [8 of substantially the same contour as will complement the contour of the periphery of the polishing wheel, so that the abrasive will be evenly applied over the entire surface of the wheel. To effect this result a scraper plate 68 is mounted to extend downwardly in the container ill, the lower edge of this plate being of the proper contour desired and being adapted to contact the abrasive in the container prior to the contact of the polishing wheel therewith. This scraper 68 is secured to a carrier 69 supported by a sleeve 10 mounted upon the shaft l6, and by an arm H which engages the upper part of the shaft 15. The holder 69 is provided with downwardly extending wings I2 and 13, shown more especially in Fig. 6, these wings lying forwardly of the plate 68 with respect to the direction of rotation of the container l8, and serving to draw the abrasive inwardly toward the central portion of the scraper plate, so that it will be properly contacted and spread out by the latter during the rotation of the container.

The operation of the device may be briefly described as follows: The polishing wheel 35 is placed upon the arbor 30, as described, with the link 28 in its uppermost position in the slot 43,

in which position it is supported by the lug 42. The handle 55 is then given a slight rotation to release the pin Bi from the notch 53 of the segment 52, and the arm 5!! is swung toward the operator, as viewed in Fig. 1, so that the polishing wheel moves from the full line position to the dotted line position shown in Fig. 2. The adhesive container is likewise moved from its full line to the dotted line position, shown in this figure, and the adhesive applied to the wheel, the wheel being manually rotated during this operation by the handle 3?. It will be observed that the wheel has been withdrawn to a position wherein it does not overlie the container, so that none of the glue or cement will fall upon the abrasive. After the glue or cement has been applied, the arm 56 and polishing wheel are returned to the full line positions shown in Fig. 2. The operator then steps upon the foot pedal 41, which withdraws the lug lZ from below the link 28 and permits the polishing wheel to drop by gravity on the surface of the abrasive in the container E8. The motor is then started and the container will be rotated, the polishing wheel also being rotated by frictional contact with the surface of the abrasive. When the wheel has been properly covered, the link 28 is manually raised to its upper position and the wheel removed.

In Figs. '7 to 10 of the drawings, I have shown a device adapted to be employed for the covering of endless polishing belts. This device is fundamentally like that just described for polishing I wheels, and distinguishes from the latter mainly in the provision of means for supporting a belt in taut condition, and also in the location of the adhesive container at a different place. With these exceptions the device is like that described in connection with Figs. 1 to 6 of the drawings.

As shown more particularly in Fig. 16 of the drawings, the link 28, which is the same as that previously described, has secured at the end thereof the arbor 39 having the reduced end 33. Over this reduced end of the arbor is rotatably received a sleeve '85, upon whi-ch'is rotatably sup-- ported the pulley it for supporting one end of the belt '5? which is to be covered. Mounted on the sleeve 75 is a handle or crank 18 designed to be used to apply pressure to the belt against the abrasive, and also designed to be used to engage with the pin 18 and rotate the sleeve 15 and the pulley l5 thereon. Upon the arbor 3B is secured a bracket #5 having a tubular portion 8!) designed to receive in turn a sleeve 8! within one end of which a rod 32 is secured by any suitable arrangement, such as the bayonet joint 83. Adjacent the other end the sleeve 8! is slotted, as shown at 8 3, and through this slot passes the arbor carrying a pulley 8%, the arbor being secured to a rod 8? slidably mounted in the sleeve 8i and urged outwardly away from the rod 82 by the spring 88. The pulley 86 supports the other end of the belt ll. Also supported by the bracket 39 is a plate 89 over which the belt '6'? is adapted to travel, and which supports the portion of the belt to which the adhesive is being applied, the adhesive being contained in the container 93 supported by a bracket 9i from the slotted member 29 at the upper end of the shaft M.

Secured to the pulley 76 is a sprocket wheel 9?. engaged by the sprocket chain $3, which is trained over a small sprocket 2 rotatably carried by a part of the bracket '59, and rotatable by the crank 95. Scrapers 95 and 9'5 may be provided to contact with the periphery of the pulley iii to scrape from the periphery of this pulley any adhesive which may drop thereon when the adhesive is being applied to the belt.

The operation of this device is substantially like that already described in connection with the device shown in Figs. 1 to 6 of the drawings. When the belt has been mounted upon the pulleyslfi and 8%, the handle 55 may be moved to swing the arm 55} to one side of the abrasive container 53. The pulley I6 is then rotated by means of the, crank 95 and associated sprockets and chain 93 to move the belt 11 over the plate 83, the adhesive being applied thereto during this movement. After the glue or cement has been applied to the belt, if it is necessary to smooth it out, the pulley E6 may be rotated rapidly by means of the crank 13, so that the glue or cement will be spread thinly over the belt by a rapid operation.

After the adhesive has been applied tothe belt, the arm 58 is swung toward the shaft l5 and the foot pedal ll disposed to allow the link 28 to drop downwardly, as shown in Fig. '7, so that the polishing belt will be in contact with the abrasive in the container is. The motor is then started and the belt covered with the abrasive. It will be noted that in the case of both machines the work member is held against the abrasive by the weight of this member and the parts which support it, including the link 28, and in addition, if desired, suitable pressure can be placed upon the work member to force it against the abrasive. It would also be obvious that, as the abrasive container 58 may be readily removed from and replaced upon the supporting table l1, if desired a number of these containers may be kept on hand containing various grades or grain sizes of abrasive, and the desired one used, depending upon the work for which the finished product is intended.

While I have shown and described some preferred embodiments of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim is:

1. Apparatus for applying abrasive to a polishing element comprising a suitably supported upwardly opening container for the abrasive, means for rotating said container, and means for upporting a polishing element above the container with its surface in contact with the abrasive in the container.

2. Apparatus for applying abrasive to a polishing element comprising a suitably supported upwardly opening container for the abrasive, means for rotating said container, and means for retatably supporting a polishing element above the container with its surface in contact with the abrasive in the container.

3. Apparatus for applying abrasive to a polishing element comprising a suitably supported container for the abrasive, means for rotating said container, and means for supporting a polishing element with its surface in contact with the" abrasive in the container, said supporting means being vertically movable to move the polishing element out of contact with the abrasive.

4. Apparatus for applying abrasive to a polishing element comprising a suitably supported co-nvtainer for the abrasive, means for rotating said container, means for supporting a polishing element with its surface in contact with the abrasive in the container, said supporting means being vertically movable to move the polishing element out of contact with the abrasive, and means to support said element in such raised position.

5. Apparatus for applying abrasive to a polishing element comprising a suitably supported container for the abrasive, means for rotating said container, and means for supporting a polishing element with its surface in contact with the abrasive in the container, said supporting means being vertically and horizontally movable to move said polishing element away from said container.

6. Apparatus for applying abrasive to a polishing element comprising a suitably supported container for the abrasive, means for rotating said container, means for supporting a polishing element with its surface in contact with the abrasive in the container, said supporting means being vertically and horizontally movable to move said polishing element away from said container, and means to hold said element in the position to which it is moved.

7. A machine for applying abrasive to a polishing element comprising a support, an abrasive container mounted upon said support, means for rotating said support, means for movably supporting a polishing element, said means being disposed above said container and being pivoted to permit the polishing element to rest on the abrasive in the container under gravity.

8. A machine for applying abrasive to a polishing element comprising a support, an abrasive container mounted upon said support, means for rotating said support, means for movably supporting a polishing element, said means being disposed above said container and being pivoted to permit the polishing element to rest on the abrasive in the container under gravity, said pivoted element being movable to a raised position, and means for holding said element in such position.

9, A machine for applying abrasive to a polishing element comprising a support, an abrasive container mounted upon said support, means for rotating said support, means for movably supporting a polishing element, said means being disposed above said container and being pivoted to permit the polishing element torest on the abrasive in the container under gravity, said pivoted element being movable to a raised position, and means for holding said element in such position, said pivoted element also being movable about a vertical axis to a position in which the polishing element is removed from said container.

10. Apparatus for applying abrasive to a polishing element, comp-rising a suitably supported container for the abrasive, means for rotating said container, means for supporting a polishing element with its surface in contact with the abrasive in said container, and a suitably supported scraper contacting with the abrasive in said container during the rotation thereof.

11. Apparatus for applying abrasive to a polishing element, comp-rising a suitably supported container for the abrasive, means for rotating said container, means for supporting a polishing element with its surface in contact with the abrasive in said container, and a suitably supported scraper contacting with the abrasive in said container during the rotation thereof, the lower edge of said scraper conforming to the surface of the polishing element to form the surface of the abrasive to the surface of the polishing element.

12. A device for applying abrasive to a polishing wheel comprising supporting means. a shaft supported thereby, means for rotating said shaft, an abrasive container mounted on said shaft, an arm on the supporting means, a member pivotally supported on said arm and carrying an arbor adjacent one end thereof, said member being vertically movable about its pivot, means removably holding said member in raised position, and said arbor being adapted to support a polishing wheel in upright position with its surface in contact with the abrasive in said container.

13. A device for applying abrasive to a polishing wheel comprising supporting means, a shaft supported thereby, means for rotating said shaft, an abrasive container mounted on said shaft, an arm on the supporting means, a member pivotally supported on said arm and carrying an arbor adjacent one end thereof, said member being vertically movable about its pivot, means removably holding said member in raised position, and said arbor being adapted to support a polishing wheel in upright position with its surface in contact with the abrasive in said container, and said pivoted member being movable in a horizontal direction to swing said polishing element away from said container.

M. A device for applying abrasive to a polishing wheel comprising supporting means, a shaft supported thereby, means for rotating said shaft, an abrasive container mounted on said shaft, an arm on the supporting means, a member pivotally supported on said arm and carrying an arbor adjacent one end thereof, said member being vertically movable about its pivot, means removably holding said member in raised position, and said arbor being adapted to support a polishing wheel in upright position with its surface in contact with the abrasive in said container, said pivoted member being movable in a horizontal direction to swing said polishing element away from said container, and a bracket swingably supported on said frame and adapted to support a container for adhesive.

15. A machine for applying abrasive to a polishing belt comprising a frame, a vertically disposed shaft rotatably supported by said frame, means for rotating said shaft, an abrasive container supported on said shaft, supporting means carried by the frame above said container, and means on said supporting means to support an endless belt in taut condition with a portion thereof in contact with the abrasive in the container.

16. A machine for applying abrasive to a polishing belt comprising a frame, a vertically disposed shaft rotatably supported by said frame, means for rotating said shaft, an abrasive container supported on said shaft, supporting means carried by the frame above said container, and means on said supporting means to support an endless belt in taut condition, said supporting means being vertically movable to permit said belt to drop by gravity into contact with the abrasive in the container.

17. A machine for applying abrasive to a polishingbelt comprising a frame, a vertically disposed shaft rotatably supported by said frame, means for rotating said shaft, an abrasive container supported on said shaft, supporting means carried by the frame above said container, and means on said supporting means to support an endless belt in taut condition, said supporting means being vertically movable to permit said belt to drop by gravity into contact with the abrasive in the container, and said supporting means comprising a pivotally mounted member adapted to be swung about its pivot to a raised position, and means for releasably holding said member in such position.

18. Apparatus for applying abrasive to a polishing element comprising a suitably supported container for the abrasive, means for rotating said container about a vertical axis, and means for supporting a polishing element with its surface in contact with the abrasive in the container.

19. Apparatus for applying abrasive to a polishing element comprising a suitably supported container for the abrasive, means for rotating said container, means for rotatabiy supporting a polishing element with its surface in contact with the abrasive in the container, and the axis of rotation of the container being at right angles to the axis of the support of the polishing element.

20. A machine for applying abrasive to a polishing belt comprising a frame, an abrasive con-' tainer supported upon said frame to rotate about a vertical axis, and means on said frame to support an endless belt in taut condition, with a portion thereof in contact with the abrasive in the container.

JOSEPH S. PORTER. 

